Device for internal combustion engines



May 31, 1938. 2,119,202

DEVICE FOR INTERNAL COMBUSTION ENGINES Filed June 26, 1934 r THROTTLE I 361 20 L v 8 L..- e I m m/ns' MAW-04D a v I I I F15: Y Z mamas/molt,

13 v Fig? 4 4 FRK J0 INVENTOR WWM W ATTORNEYS Patented May 31, 1938 UNITED STATES DEVICE FOR INTERNAL COMBUSTION ENGINES Max Dach, Flushing, N. Y.

Application June 26,

7 Claims.

This invention relates to a device to be used in connection with internal combustion engines and is particularly useful when such engines are used for driving motor vehicles. By this inven- 5 tion the maximum speed at which the engine can be run is predetermined and can be varied. If the speed of the engine becomes too high, the vacuum in the intake manifold is broken and the ignition for the engine is cut out or disconnected.

In carrying out the invention an air inlet is provided, preferably with several branches to the inlet manifold of the engine, this air inlet being normally closed by a valve that is opened when the engine reaches a predetermined speed. For this purpose the valve may be connected to the governor of the engine or electrical or hydraulic or other devices can be used to open the valve 'when the engine reaches a predetermined speed.

Provision is also made so that the rapidity with which the vacuum in the intake manifold is broken can be varied, thus avoiding complete breaking of the vacuum when the engine exceeds the predetermined speed for only a short while.

The air inlet may be provided with branches leading to the atmosphere with a valve in one branch that is closed only when the throttle valve to the engine is opened an appreciable extent and the other branch may be provided with a normally closed valve that can be opened when the speed of the engine approaches the maximum predetermined permissible speed. Provision is also made by means of which an alarm is sounded when the engine reaches its approximate maximum predetermined speed. 7

The invention will be understood from the description in connection with the accompanying drawing in which Fig. 1 is a side view of an illustrative embodiment of the invention; Fig. 2 is a 40 longitudinal section of a device like that shown in Fig. 1 with certain features added; Fig. 3 is a side view of a modification and Fig. 4 is a plan view of Fig. 3.

In the drawing reference character I indicates a5 an air inlet for the intake manifold that is closed atone end and provided with a flange 2 by means of which it may be attached to the engine, or any other convenient support in the vicinity of the intake manifold. The other end of the inlet 1 is open and a plurality of outlets 3 is provided through its walls from which connections 3a are made to a number of places distributed along the intake manifold.

A valve 4 is provided in the inlet I, this valve being shown as a butterfly type, although other 1934, Serial No. 732,409

types of valves may be used. The valve 4 is mounted upon a shaft 5 that extends through air-tight bearings in the side walls of the inlet I. An arm 6 is connected to one of the outwardly extending ends of the shaft 5 and a connection I is pivoted to the end of the arm 6, this connection 1 extending, for example, to the governor of the engine. The valve 4 may be connected in other ways so as to be opened when the engine speed reaches a predetermined value.

A mercury switch 8 is connected to the other outwardly extending end of the shaft 5 and the ignition circuit of the engine, a portion of which is indicated by the wires 9, extends through this switch so that the ignition circuit is opened when the valve 4 opens sufficiently.

In the modification shown in Fig. 2 the inlet I is externally threaded, as shown at Ill, and a cap H is screwed on to the same. The cap II is provided with a hole l2 into which a conically shaped closure plug or closure member l3 that is supported on the inlet ID by means of the spider I4, enters when the cap II is adjusted so as to vary the size of the opening for air to enter the inlet I.

In the modification shown in Figs. 3 and 4 parts like those already described are designated bythe same reference characters with primes. In this modification the open end of the inlet l is enlarged, as shown at 20, and is provided with two branches 2| and 22.

The branch 2| is shown as being provided with a valve 23 of the butterfly type. This valve is mounted on a shaft 24 that extends through airtight bearings in the walls of the branch 2|. An arm 25 is connected to one of the outwardly extending ends of the shaft 24 and a connection 26 is pivoted to the end of the arm 25. The connection 26 may extend to the throttle of the engine so that when the throttle is opened to a position beyond idling speed the valve 23 is closed.

. Connections from the throttle of the engine to the valve 23 may be made in any other convenient way to close this valve when the throttle opens.

A valve 21, which may also be of the butterfly type, is provided in the branch 22. This valve is carried by a shaft 28 that extends through air-tight bearings in the walls of the branch 22. An arm 29 is rigidly attached to an extending end of the shaft 28 and a mercury switch 30 is attached to the other extending end of this shaft 28.

An arm 3| is rigidly conected to the outwardly extending end of the shaft 5' opposite the end to which the mercury switch 8' is connected and an adjustable screw 32 is provided near the outer end of the arm 3| in position to contact with the arm 29 when the valve 4 is opened sufficiently.

A whistle or other alarm device 33 that is operated when air passes through the inlet 22 is provided in this inlet.

The outer end of the enlarged portion 26 of the inlet I is closed by a plate 35. An opening 36 is provided in this plate preferably between the branches 2| and 22. An air regulator is mounted on the plate 35 above the hole 36. This air regulator comprises an externally threaded cylindrical member 3'! surrounding the hole 36 and a conical plug 38 is carried by the spider 39 near the center of the member 31. A cap 40, provided with an opening 4! into which the plug 38 enters, is screwed upon the member 31 and can be adjusted in position to regulate the amount of air that is permitted to pass into the inlet I through the hole 36. A connection 42, which leads from an air cleaner or purifier, may be connected to the outer end of the enlarged portion 20 of the inlet.

The operation is as follows:

With the device shown in Fig. 1, when the engine reaches a predetermined maximum speed that may be fixed at different points by setting the governor to which the connection 1 is connected, the valve 4 is opened and the air rushes into the inlet l and thence through the openings 3 into the inlet manifold, thus breaking the vacuum and causing fuel to cease being fed into the engine. At the same time the switch 8 opens the circuit through the ignition for the engine. This circuit may conveniently be through the primary coil. In the modification shown in Fig. 2 the cap II can be so adjusted that there will be a delay before the vacuum is broken or the adjustment may be such that the vacuum is merely reduced instead of being broken when the valve 4 is open.

In the device shown in Figs. 3 and 4 the valve 4' opens sufliciently when the speed exceeds the maximum for which the device is set, thus permitting air to enter through the opening 36 and reduce or break the vacuum. The valve 23, that is connected to the throttle of the engine, will be open while the engine is running at idling speed, but closes when the throttle is opened to feed fuel to the engine. The valve 21 is normally closed, but opens when the engine speed approaches the maximum for which the device is set due to the fact that a slight opening of the valve 4 causes the screw 32 on the long arm 3| to strike the short arm 29 of the valve 21 and open this valve sufficiently to permit air to pass through the branch 22 and sound the alarm 33, thus warning the operator that he has reached about the maximum permissible speed and also apprising others that the vehicle is traveling at high speed.

I claim:

1. In a device for the intake manifold of an internal combustion engine, an inlet, a valve in said inlet, and means independent of the suction in the intake manifold to open said valve and break the ignition circuit to said engine when the engine reaches a predetermined speed.

2. In a device for the intake manifold of an internal combustion engine into which fuel is caused to fiow, an'inlet, a valve in said inlet, and means independent of the suction in the intake manifold to open said valve and break the ignition circuit to said engine when the engine reaches a predetermined speed, said means comprising a switch controlled by said valve.

3. In a device for the intake manifold of an internal combustion engine, a branched inlet, a valve in said inlet, an air operated alarm in one of the branches, and means to open said first named valve when the engine reaches a predetermined speed.

4. In a device for the intake manifold of an internal combustion engine, a branched inlet, a valve in said inlet, a valve in one of the branches which is opened by a predetermined amount of opening of said first named valve, and means independent of the suction in the intake manifold to open said first named valve when the engine reaches a predetermined speed.

5. In a device for the intake manifold of an internal combustion engine, a branched inlet,

a valve in said inlet, a valve in each one of said branches, and means independent of the suction in the intake manifold to open said first named valve when the engine reaches a predetermined speed.

6. In a device for the intake manifold of an 1 internal combustion engine into which fuel is caused to flow, a branched inlet and adjustable means independent of the suction in the intake manifold for admitting various regulated amounts of enough air into said inlet independent of said branches to reduce the vacuum therein sufiiciently to cause fuel to cease being fed into the engine.

7. In a device for the intake manifold of an internal combustion engine into which fuel is caused to fiow, a branched inlet, valves in the branches, and adjustable means independent of the suction in the intake manifold for admitting various regulated amounts of enough air into said inlet independent of said branches to reduce the vacuum therein sufficiently to cause fuel to cease being fed into the engine.

MAX DACH. 

